PSE certification for Japan

The diamond mark. Applied to the higher-risk category, and it requires a conformity inspection by a registered conformity assessment body. That is a third-party process with lead time, cost and a defined scope — and it is not something a factory can self-declare its way through.

The round mark. Applied to the remainder of the products in scope. It is a self-declaration route supported by testing against the applicable technical requirements and by records the notifying operator keeps.

So the first question in any Japanese project is which category the product falls into, and it has to be answered for the specific product rather than for the category in general. This page publishes no category lists deliberately: the classification decides the cost, the timeline and the parties involved, and a list copied into a guide is the sort of thing that is right until it is not.

A single product can also present more than one question at once. A mains-connected product with a radio in it meets the electrical scheme and the radio scheme separately, and they are not the same approval or the same body.

Lithium-ion batteries and the products built around them are within the scheme's scope, which is why this comes up so often for the charging and power category — and why "the factory has CE" is not a starting point for Japan.

The scheme places its obligations on a business operator that notifies the authorities — the manufacturer or the importer. That party keeps the records, performs or arranges the required conformity work, and affixes the mark.

For a business outside Japan, this is the item to settle first, because it is a corporate arrangement rather than a document. Options are typically an importer of record in Japan who takes the role, a Japanese entity of your own, or a distributor who is willing to be the notifier — and each has a different commercial consequence for who controls the product and the brand.

It is not solved by a forwarder, and it is not solved by shipping direct to consumers. A cross-border seller with no notifier is not "outside the scheme"; they are selling a product whose required paperwork nobody holds.

And it affects the marking. The mark and the accompanying details identify the responsible business, which means the artwork depends on a decision you may not have made yet — a printing lead time attached to a corporate question.

Ask a prospective Japanese partner directly whether they will act as the notifying operator, and what they require from you to do it. A distributor who says yes without asking for test data is a distributor who has not done it before.

What a Chinese factory can genuinely provide: test data against the applicable Japanese technical requirements, construction and component documentation, the bill of materials for the parts that matter to electrical safety, and — where the diamond route applies — cooperation with the registered body's inspection.

What it cannot provide: the notification, the records obligation, or the responsible business in Japan. A factory that says it will "handle PSE" is describing test data plus a certificate from somewhere, and that is not the same as the scheme being satisfied.

Watch for a document styled as a "PSE certificate" for the round-mark route. That route is a self-declaration, so a laboratory document is test evidence rather than an approval — the same distinction that trips people up with CE, in a different language.

Ask which components the testing depended on. Japanese electrical requirements can turn on specific components and their ratings, so a change of a transformer, a capacitor or an insulation material can invalidate the basis of the declaration. Name those components in the specification with a notification clause.

And ask for the plug. Japan has its own plug and voltage conventions, so a product designed for another market is not merely a paperwork exercise away from being sellable — it may need a different inlet, a different cord set and a different rating.

First, classify: which category, therefore which mark, therefore which route. Everything downstream depends on it and it is the cheapest question to answer.

Second, settle the notifying operator. Until somebody in Japan holds that role, the rest of the work has no owner and the marking artwork cannot be finalised.

Third, confirm the technical requirements with the party who will actually be responsible, and get the factory's test data reviewed against them rather than assuming existing reports transfer.

Fourth, handle the radio side separately if there is one, and the battery documentation separately again. Three strands, three timelines, and the longest one sets the launch date.

Doing them in that order is what prevents the common outcome: a container of product that is finished, marked for another market, and unsellable until a corporate arrangement that takes weeks is put in place.